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    <title>第四章：Chains模块</title>
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        <h1>第四章：Chains模块</h1>

        <p>本章详细介绍了Langchain中的Chains模块，包括基础概念、LLMChain、Sequential Chains、Router Chains以及自定义Chain的实现。点击下方链接查看各小节内容：</p>
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            <li><a href="../chapter4/chapter4_sections/4-1_what_is_chain.html">4.1 什么是Chain？</a></li>
            <li><a href="../chapter4/chapter4_sections/4-2_llmchain_basic_chain.html">4.2 LLMChain：最基础的Chain</a></li>
            <li><a href="../chapter4/chapter4_sections/4-3_sequential_chains.html">4.3 Sequential Chains：按顺序链接多个Chain</a></li>
            <li><a href="../chapter4/chapter4_sections/4-4_router_chains.html">4.4 Router Chains：根据输入动态选择下一个Chain (进阶)</a></li>
            <li><a href="../chapter4/chapter4_sections/4-5_custom_chain.html">4.5 自定义Chain</a></li>
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